In most religious congregations, consuming illegal drugs during the service would result in a less than enthusiastic response from the ecclesiastical leadership. Indeed, survey after survey has shown that religiosity and drug use are reliably negatively correlated – the more religious you are, the less likely you are to do drugs of any kind. But the story may not be so simple. Researchers in Eastern Europe are finding a potential counter-phenomenon: consumers of certain drugs, particularly marijuana and psychedelics, may be more inclined to mystical and spiritual experiences.